IHO, I think there is no perfect solution for any of the complex network issues, however if we know of a config that reduces the risk signficantly then I think we should adopt that as a default config.
On Wed, Jan 15, 2014 at 11:17 AM, joergpra...@gmail.com < joergpra...@gmail.com> wrote: > The preflight checklist is misleading in several statements: > > - you can not "accidentally join" clusters because of multicast. It > happens when using the default cluster name > > - "a lot of chatter with no use" is just pure ignorance of network > technology. Multicast was designed for zero config, and I love ES for zero > config. And there is no chatter if you set up a private network for ES > hosts. That is simple with a router/switch and DHCP. Whole corporation and > datacenter networks can not live without link-local config for example. > > - "you don't have to include the whole cluster" is misleading - each data > node must always be able to connect to one of the eligible master nodes, or > the cluster may not work correctly > > - the "avoiding split brain" section is a very bold and wrong headline. It > is promising that split-brains can be avoided by a N/2+1 setting. > Unfortunately that is nonsense, the truth is, it lowers the risk > significantly. But there can still be obscure network splits where two > halves of a split cluster may overlap, so the condition of N/2+1 can become > true for both halves. > > Why do I not count hosts/nodes? There is a difference between the number > of data nodes and master eligible nodes in a cluster. I have three master > eligible nodes and set minimum_master_nodes to 3, and that's it. After that > I can start or stop additional data nodes as much as I like. > > Jörg > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG8Yi8KuG7%2BYa3HQEAj%2BDhPUvzoqd6aR-Gpd4iQxAF%3D%2Bw%40mail.gmail.com > . > > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAOT3TWoibQk_0o313aXEwYkbYrQiVnmgrp4eNnOMTurmCS6PPw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
